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Full text of "Texas Instruments TI-92 Repair Manual"

Repairing Texas Instruments TI-92 Screen Cover 



iiixit 



Repairing Texas Instruments TI-92 Screen Cover 



Tools used in this guide 

• Phillips #00 Screwdriver (1) 

• Plastic Opening Tools (1) 



In this guide we will show how to access and remove the plastic covering and protecting the LCD 
display. 



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Repairing Texas Instruments TI-92 Screen Cover 




Step 1 - installation Back Cover 

• The first step to any repair operation is to 
remove the front cover. 



& 



• Grab the back of the calculator with one hand and the 
cover with the other. 

• Pull the cover off from one of the sides for easy 
removal. 




Step 2 

• Orientate the calculator with the top facing towards you. 

• Slide the locking tab,found on the top part of the 
calculator, to the unlock position. 



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Repairing Texas Instruments TI-92 Screen Cover 




Step 3 

• "Locking Tab" 

• To remove the back cover, slide the cover away from 
the locking tab towards the bottom of the calculator until 
the cover no longer slides. 

• Then with the front of the calculator facing down, pull 
up on the back cover. 

• The calculator should now be orientated with the front 
facing down, as shown in picture 2. 




Step 4 - installation Batteries 

• The Batteries are now exposed and the 
calculator is face down with the back 
towards you. 



& 



• Remove the bottom batteries by pressing the battery 
towards you while pulling it out from the far end. 

• If you can not do the previous step with your 
finger try using a flat ended tool such as an 
Ipod opening tool. 



s 



• After the bottom battery has been removed push or 
slide the other(top) battery towards you until it is fully 
exposed in the battery slot. 

• Now simply remove the battery. 



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Repairing Texas Instruments TI-92 Screen Cover 




Step 5 - Back Case 

• Using a Philips Screwdriver #00 unscrew the twelve 
1 1 .8mm screws shown in the picture and located on the 
back of the calculator. 




Step 6 

Unscrew the 19mm screw located near center of the 
back of the calculator. 

• Remove the panel being held by the screw. 



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Repairing Texas Instruments TI-92 Screen Cover 




Step? 

• Using the same Phillips screwdriver, unscrew the 
remaining three 11.8mm screws. 




Steps 

• Using the Ipod Opening Tool pull up on both sides of 
the rectangular module while keeping the rest of the 
calculator flat on a surface face down 



You may get a lot of resistance from the 
module. Do not use too much force as you 
risk damage. Use small amounts offeree to 
work the module out. 



A 



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Repairing Texas Instruments TI-92 Screen Cover 




Step 9 

• Pull out the rectangular module when it is finally loose 
enough. 




Step 10 

• Now pull up on the back cover of the calculator while 



holding the rest of it flat on a surface. 

Be careful not to tilt the front of the 
calculator at this point. The keyboard 
buttons are now unsupported and will fall 
out of place. 



A 



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Repairing Texas Instruments TI-92 Screen Cover 




Step 11 - Screen Cover 

• Lift one of the ends of the sticky black strips located 
around the screen. 

• This process will be facilitated by the use of the Ipod 
Opening Tools or a similar tool. 




Step 12 

• Start to remove the strips by pulling them outward 
carefully. Lift one end of the strip and peel it down to 
the other end. 

• If the strips are sticking to each other you do not need 
to separate them from each other, simply continue 
pulling outward on the strips around the edges. 



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Repairing Texas Instruments TI-92 Screen Cover 




Step 13 

• If one of the remaining strips is sticking to the others 
and can not be easily removed, use a tool such as the 
Ipod Opening Tool to start pulling the strip up. 




Step 14 

The yellow circles and the spots on the other side of the 
screen from the circles represent circular tabs holding 
the plastic screen cover in. 



• Use a flat tool such as the Ipod Opening tool to 
separate the screen from the tabs. 

• When removing the screen, the top part of 
the tabs holding the screen will break in 
order to allow for movement. 

• If tilting the panel to remove screen, be 
careful as the buttons may fall out. To avoid 
this, keep rubber cover over buttons during 
operations and keep angle of tilt at a 
minimum. 






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Page 8 of 9 



Repairing Texas Instruments TI-92 Screen Cover 



To reassemble your device, follow these instructions in reverse order. 



This document was last generated on Dec 14, 2010. 



© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 9 of 9